自転車競技のための人－自転車系のシミュレーション解析

Abstract

During standing pedaling in a bicycle race, a human body and a bicycle are swinging in right and left. In order to investigate such movement, sagittal plane models and experiments using an ergometer in the previous studies were insufficient. In the present study, a three dimensional simulation model to analyze such problem was constructed using a multibody dynamics software. In this model, pedaling motion was achieved by PID control of joints of the human body. The simulation of sitting pedaling at the rate of 120 rpm for a power output of 200W as well as standing pedaling at the rate of 73 rpm for a grade of 8% were conducted, respectively. By comparing the results with those in previous studies, the validity of the simulation model was confirmed. In the simulation of standing pedaling, the knee joint torque and crank torque increased at a power phase and the crank torque decreased at a recovery phase when the bicycle swung. It was suggested that the rider makes the bicycle swinging to obtain the larger crank torque at the power phase.